NAD-C315-int-sm 维修电路原理图.pdf

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1、NADSERVICE MANUALC 315BEESTEREOAMPLIFIERC 315BEESTEREOAMPLIFIERRadioFans.CN 收音机爱 好者资料库TABLE OF CONTENTS DESCRIPTION P A G E SERVICE CAUTION.3- 4REAR PANEL/FRONT PANEL VIEW.5 SPECIFICATIONS.6 WIRING DIAGRAM7 BLOCK DIAGRAM. .8- 12ALIGNMENT PROCEDURE.13 SCHEMATICS.14- 16 PCB LAYOUT.17- 19TROUBLE SHOOTI

2、NG GUIDE.20 ELECTRICAL PARTS LIST.21- 27 EXPLODED VIEW.28 EXPLODED VIEW PARTS LIST.29 PACKING VIEW PARTS LIST.30 RadioFans.CN 收音机爱 好者资料库PRODUCT SAFETY SERVICING GUIDELINES CAUTION : DO NOT ATTEMPT TO MODIFY THIS PRODUCT INANY WAY. NEVER PERFORM CUSTOMIZED INSTALLATIONSWITHOUT MANUFACTURER S APPROVAL

3、. UNAUTHORIZEDMODIFICATIONS WILL NOT ONLY VOID THE WARRANTY, BUTMAY LEAD TO YOUR BEING LIABLE FOR ANY RESULTINGPROPERTY DAMAGE OR USER INJURY.SERVICE WORK SHOULD BE PERFORMED ONLY AFTER YOUARE THOROUGHLY FAMILIAR WITH ALL OF THE FOLLOWINGSAFETY CHECKS AND SERVICING GUIDELINES. TO DOOTHERWISE, INCREA

4、SES THE RISK OF POTENTIAL HAZARDSAND INJURY TO THE USER. WHILE SERVICING, USE AN ISOLATION TRANSFORMER FORPROTECTION FROM AC LINE SHOCK.SAFETY CHECKSAFTER THE ORIGINAL SERVICE PROBLEM HAS BEENCORRECTED. A CHECK SHOULD BE MADE OF THEFOLLOWING.SUBJECT : FIRE & SHOCK HAZARD1. BE SURE THAT ALL COMPONENT

5、S ARE POSITIONED INSUCH A WAY AS TO AVOID POSSIBILITY OF ADJACENTCOMPONENT SHORTS. THIS IS ESPECIALLY IMPORTANTON THOSE MODULES WHICH ARE TRANSPORTED TO ANDFROM THE REPAIR SHOP. 2. NEVER RELEASE A REPAIR UNLESS ALL PROTECTIVEDEVICES SUCH AS INSULATORS, BARRIERS, COVERS,SHIELDS, STRAIN RELIEFS, POWER

6、 SUPPLY CORDS, ANDOTHER HARDWARE HAVE BEEN REINSTALLED PERORIGINAL DESIGN. BE SURE THAT THE SAFETY PURPOSEOF THE POLARIZED LINE PLUG HAS NOT BEEN DEFEATED.3. SOLDERING MUST BE INSPECTED TO DISCOVER POSSIBLECOLD SOLDER JOINTS, SOLDER SPLASHES OR SHARPSOLDER POINTS. BE CERTAIN TO REMOVE ALL LOOSEFOREI

7、GN PARTICLES.4. CHECK FOR PHYSICAL EVIDENCE OF DAMAGE ORDETERIORATION TO PARTS AND COMPONENTS. FORFRAYED LEADS, DAMAGED INSULATION (INCLUDING ACCORD). AND REPLACE IF NECESSARY FOLLOW ORIGINALLAYOUT, LEAD LENGTH AND DRESS.5. NO LEAD OR COMPONENT SHOULD TOUCH A RECEIVINGTUBE OR A RESISTOR RATED AT 1 W

8、ATT OR MORE. LEADTENSION AROUND PROTRUDING METAL SURFACES MUSTBE AVOIDED.6. ALL CRITICAL COMPONENTS SUCH AS FUSES,FLAMEPROOF RESISTORS, CAPACITORS, ETC. MUST BEREPLACED WITH EXACT FACTORY TYPES, DO NOT USEREPLACEMENT COMPONENTS OTHER THAN THOSESPECIFIED OR MAKE UNRECOMMENDED CIRCUITMODIFICATIONS.7.

9、AFTER RE-ASSEMBLY OF THE SET ALWAYS PERFORM ANAC LEAKAGE TEST ON ALL EXPOSED METALLIC PARTS OFTHE CABINET, (THE CHANNEL SELECTOR KNOB, ANTENNATERMINALS. HANDLE AND SCREWS) TO BE SURE THE SETIS SAFET TO OPERATE WITHOUT DANGER OF ELECTRICALSHOCK. DO NOT USE A LINE ISOLATION TRANSFORMERDURING THIS TEST

10、 USE AN AC VOLTMETER, HAVING 5000OHMS PER VOLT OR MORE SENSITIVITY, IN THEFOLLOWING MANNER; CONNECT A 1500 OHM 10 WATTRESISTOR, PARALLELED BY A .15 MFD, 150V AC TYPECAPACITOR BETWEEN A KNOWN GOOD EARTH GROUND(WATER PIPE, CONDUIT, ETC.) AND THE EXPOSEDMETALLIC PARTS, ONE AT A TIME. MEASURE THE AC VOL

11、TAGE ACROSS THE COMBINATIONOF 1500 OHM RESISTOR AND .15 MFD CAPACITOR. REVERSE THE AC PLUG AND REPEAT AC VOLTAGEMEASUREMENTS FOR EACH EXPOSED METALLIC PART. VOLTAGE MEASURE MUST NOT EXCEED 75 VOLTS R.M.S.THIS CORRESPONDS TO 0.5 MILLIAMP AC ANY VALUEEXCEEDING THIS LIMIT CONSTITUTES A POTENTIALSHOCK H

12、AZARD AND MUST BE CORRECTED IMMEDIATELY.SUBJECT : GRAPHIC SYMBOLSSUBJECT : TIPS ON PROPER INSTALLATION1. NEVER INSTALL ANY PRODUCT IN A CLOSED-IN RECESS,CUBBYHOLE OR CLOSELY FITTING SHELF SPACE. OVEROR CLOSE TO HEAT DUCT, OR IN THE PATH OF HEATEDAIR FLOW.2. AVOID CONDITIONS OF HIGH HUMIDITY SUCH AS:

13、OUTDOOR PATIO INSTALLATIONS WHERE DEW IS AFACTOR, NEAR STEAM RADIATORS WHERE STEAMLEAKAGE IS A FACTOR, ETC.3. AVOID PLACEMENT WHERE DRAPERIES MAY OBSTRUCTREAR VENTING. THE CUSTOMER SHOULD ALSO AVOID THEUSE OF DECORATIVE SCARVES OR OTHER COVERINGSWHICH MIGHT OBSTRUCT VENTILATION.4. WALL AND SHELF MOU

14、NTED INSTALLATIONS USING ACOMMERCAL MOUNTING KIT MUST FOLLOW THE FACTORYAPPROVED MOUNTING INSTRUCTIONS A PRODUCTMOUNTED TO A SHELF OR PLATFORM MUST RETAIN ITSORIGINAL FEET (OR THE EQUIVALENT THICKNESS INSPACERS) TO PROVIDE ADEQUATE AIR FLOW ACROSSTHE BOTTOM, BOLTS OR SCREWS USED FOR FASTENERSMUST NO

15、T TOUCH ANY PARTS OR WIRING. PERFORMLEAKAGE TEST ON CUSTOMIZED INSTALLATIONS.5. CAUTION CUSTOMERS AGAINST THE MOUNTING OF APRODUCT ON SLOPING SHELF OR A TILTED POSITION,UNLESS THE PRODUCT IS PROPERLY SECURED.6. A PRODUCT ON A ROLL-ABOUT CART SHOULD BE STABLEON ITS MOUNTING TO THE CART. CAUTION THECU

16、STOMER ON THE HAZARDS OF TRYING TO ROLL A CARTWITH SMALL CASTERS ACROSS THRESHOLDS OR DEEPPILE CARPETS.7. CAUTION CUSTOMERS AGAINST THE USE OF A CART ORSTAND WHICH HAS NOT BEEN LISTED BY UNDERWRITERSLABORATORIES, INC. FOR USE WITH THEIR SPECIFICMODEL OF TELEVISION RECEIVER OR GENERICALLYAPPROVED FOR

17、 USE WITH T.V. S OF THE SAME ORLARGER SCREEN SIZE.8. CAUTION CUSTOMERS AGAINST THE USE OF EXTENSIONCORDS, EXPLAIN THAT A FOREST OF EXTENSIONSSPROUTING FROM A SINGLE OUTLET CAN LEAD TODISASTROUS CONSEQUENCES TO HOME AND FAMILY.THE LIGHTNING FLASH WITH ARROWHEAD SYMBOL, WITHIN ANEQUILATERAL TRIANGLE,

18、IS INTENDED TO ALERT THE USER TO THEPRESENCE OF UNINSULATED “ DANGEROUS VOLTAGE” WITHIN THEPRODUCT S ENCLOSURE THAT MAY BE OF SUFFICIENT MAGNITUDE TOCONSTITUTE A RISK OF ELECTRIC SHOCK.THE EXCLAMATION POINT WITHIN AN EQUILATERAL TRIANGLE ISINTENDED TO ALERT THE USER TO THE PRESENCE OF IMPORTANTOPERA

19、TING AND MAINTENANCE (SERVICING) INSTRUCTIONS IN THELITERATURE ACCOMPANYING THE APPLIANCE.SERVICING PRECAUTIONSCAUTION : Before servicing the A/V Receiver covered by thisservice data and its supplements and addends, read and follow theSAFETY PRECAUTIONS. NOTE : if unforeseen circumstancescreate conf

20、lict between the following servicing precautions and anyof the safety precautions in this publication, always follow the safetyprecautions.Remember Safety First:General Servicing Precautions1. Always unplug the A/V Receiver AC power cord from the ACpower source before:(1) Removing or reinstalling an

21、y component, circuit board,module, or any other assembly.(2) Disconnecting or reconnecting any internal electrical plug orother electrical connection.(3) Connecting a test substitute in parallel with an electrolyticcapacitor.Caution : A wrong part substitution or incorrect polarity installationof el

22、ectrolytic capacitors may result in an explosion hazard.2. Do not spray chemicals on or near this A/V Receiver or any of itsassemblies.3. Unless specified otherwise in this service data, clean electricalcontacts by applying an appropriate contact cleaning solution tothe contacts with a pipe cleaner,

23、 cottontipped swab, orcomparable soft applicator.Unless specified otherwise in this service data, lubrication ofcontacts is not required.4. Do not defeat any plug/socket B+ voltage interlocks with whichinstruments covered by this service manual might be equipped.5. Do not apply AC power to this A/V

24、Receiver and/or any of itselectrical assemblies unless all solid-state device heat sinks arecorrectly installed.6. Always connect test instrument ground lead to the appropriateground before connecting the test instrument positive lead. Alwaysremove the test instrument ground lead last.Insulation Che

25、cking ProcedureDisconnect the attachment plug from the AC outlet and turn thepower on. Connect an insulation resistance meter(500V) to theblades of the attachment plug. The insulation resistance betweeneach blade of the attachment plug and accessible conductive parts(Note 1) should be more than 1M-o

26、hm.Note 1 : Accessible Conductive Parts including Metal panels, Inputterminals, Earphone jacks, etc.Electrostatically Sensitive (ES) DevicesSome semiconductor (solid state) devices can be damaged easily bystatic electricity. Such components commonly are calledElectrostatically Sensitive (ES) Devices

27、. Examples of typical Esdevices are integrated circuits and some field effect transistors andsemiconductor chip components.The following techniques should be used to help reduce theincidence of component damage caused by static electricity.1. Immediately before handling any semiconductor component o

28、rsemiconductor-equipped assembly, drain off any electrostaticcharge on your body by touching a known earth ground.Alternatively, obtain and wear a commercially availabledischarging wrist strap device, which should be removed forpotential shock reasons prior to applying power to the unit undertest.2.

29、 After removing an electrical assembly equipped with ES devices,place the assembly on a conductive surface such as aluminumfoil, to prevent electrostatic charge buildup or exposure of theassembly.3. Use only a grounded-tip soldering iron to solder or unsolder ESdevices.4. Use only an antistatic sold

30、er removal device. Some solderremoval devices not classified a “ anti-static” can generateelectrical charges sufficient to damage ES devices.5. Do not use freonpropelled chemicals. These can generateelectrical charge sufficient to damage ES devices.6. Do not remove a replacement ES device from its p

31、rotectivepackage until immediately before you are ready to install it. (Mostreplacement ES devices are packaged with leads electricallyshorted together by conductive foam, aluminum foil, orcomparable conductive material).7. lmmediately before removing the protective material from theleads of a repla

32、cement ES device, touch the protective material tothe chassis or circuit assembly into which the device will beinstalled.Caution : Be sure no power is applied to the chassis or circuit, andobserve all other safety precautions.8. Minimize bodily motions when handing unpackaged replacementES devices.

33、(Normally harmless motion such as the brushingtogether of your clothes fabric or the lifting of your foot from acarpeted floor can generate static electricity sufficient to damagean ES device.)?VOLUMETREBLEBALANCEBASS5NDACEEB51346897312TONEDEFEATPHONESTAPEVIDEOTUNERCDAUXMPDISCStereo Integrated Ampli

34、fier C 315BEE?1. DISC INPUT2. CD INPUT3. VIDEO INPUT4. AUX INPUT5. TUNER INPUT6. TAPE IN/OUT7. SPEAKERS OUT8. AC LINE CORD9. POWER SWITCH1. POWER2. POWER/STAND BY/ PROTECTION LED3. HEADPHONE4. INPUT SELECTOR5. IR RECEIVER6. TONE CONTROLS7. TONE DEFEAT8. BALANCE CONTROL9. VOLUME CONTROLSPECIFICATIONS

35、 PREAMP IN , SPEAKERS OUT CONTINUOUS AVERAGE POWER 40 W (16 dBW) OUTPUT INTO 8 OHMS OR 4 OHMS (Min. power per channel, 20 Hz 20 kHz, with no more than rated distortion) THD + Noise 200 Input Impedance R = 50 kohms C = 100pF Input sensit ivit y (for rated output into 8 ohms) 200 mV Volt age gain 39 d

36、B Fr equency r esponse 20 Hz 20 kHz +/- 1.0 dB (tone defeat off) +/- 0.2dB (tone defeat on) Signal / Noise r at io, A-weighted 95dB r ef . 1 W 1 1 1dB r ef . 40 W SMPTE I.M. 0.02% (Intermodulation Distortion, 60 Hz + 7 kHz, 4:1, from 250 mW to rated output) IHF I.M. 0.01% (CCIF IM Distortion, 19 + 2

37、0 kHz at rated output) Headphones Out put Impedance 68 ohms Maximum input signal 7 V CONTROLS Treble +/- 5 dB at 10 kHz Bass +/- 8 dB at 100 Hz DIMENSIONS AND WEIGHTS Net Weight 5 .25 kg ( 1 1.5 Ib) Shipping Weight 6.5 kg (14.3lb) DIMENSION (WHD) 435 X70 X 242mm TAPE OUT LDISC LDISC RCD RVIDEO RAUX

38、RTAPE1 IN RTAPE1 IN LAUX LVIDEO LCD LPREAPMAMP CIRCUITBASSRT31RT32RT34TREBLEBALANCESW31TONE DEFEATRT33VOLUME PRE-OUT LPRE-OUT RMAIN IN RMAIN IN LPOWER AMP CIRCUIT LCIRCUIT RPOWER AMPPROTECTION CIRCUITRL301MCU(W78E52C)JK31R330POSISTOR(80 DEGREE C) HEADPHONETUNER RTUNER LCONTROLMP RMP LTAPE OUT RSpeak

39、er RSpeaker L JQX-115F/ 24VOL-VOL+VOLUME CONTROL CIRCUIT (REMOTE)MUTEQ120MUTEQ220MUTE CIRCUIT FOR RECORD OUTTEMP COMPENSATION CIRCUIT(Q122,Q222 ONTHE MAIN HEATSINK)INPUT AND STANDBYINDICATION LEDSINPUT SELECTION IC(TC9164CNG)+/ -17V SUPPLY CIRCUIT+/ -45V SUPPLY CIRCUITMUTEQ105MUTEQ205MAIN MUTE CIRCU

40、IT BLOCK DIAGRAM+5VSandby control line18V Power SupplyControl Circuit+5VInput selectionKey s and LEDS+5VMain Mute Mute CircuitRecord OutCircuitIC503VSGIR receiverD501REDBLUEStandby LEDMICROPROCESSOR CONNECTION DIAGRAMAMBERVolumeCircuitNC1NC2NC3Vss4SDA5SCL6NC7Vcc8IC50224C01C50427PC50527PX50111.0592MH

41、zPHONE5MP INDATACLKSTBU301TC9164Input Selection ICP1.01RST9RXD/P3.010TXD/P3.111INT0/P3.212INT1/P3.313T0/P3.414T1/P3.515WR/P3.616RD/P3.717XTAL218XTAL119VSS20P2.0/A821P2.1/A922P2.2/A1023P2.3/A1124P2.4/A1225P2.5/A1326P2.6/A1427P2.7/A1528PSEN29ALE30EA31P0.7/AD732P0.6/AD633P0.5/AD534P0.4/AD435P0.3/AD336P

42、0.2/AD237P0.1/AD138P0.0/AD039VDD40P1.12P1.23P1.34P1.45P1.56P1.67P1.78IC501AT89S5124C01KEY BOARDIC502?12345678NCNCNCVSSVCCNCSCLSDA12345678910111213141516171819202122232425262728293031323334353637383940VccP0.0(AD0)P0.1(AD1)P0.2(AD2)P0.3(AD3)P0.4(AD4)P0.5(AD5)P0.6(AD6)P0.7(AD7)P2.0(A8)P2.1(A9)P2.2(A10)

43、P2.3(A11)P2.4(A12)P2.5(A13)P2.6(A14)P2.7(A15)PSENALE/ PROGEA/ VPP(T2)P1.0(T2EX)P1.1P1.2P1.3P1.4P1.5P1.6P1.7RST(RXD)P3.0(TXD)P3.1(INT0)P3.2(INT1)P3.3(T1)P3.5(T0)P3.4(WR)P3.6(RD)P3.7XTAL1XTAL2GNDAT89S51/ W78E052CMAIN BOARD : IC501PIN CONFIGURATIONOSCWATCH DOGPORT 1LATCHLATCHLATCHLATCHPORT 0PORT 2PORT

44、0 DRIVERSPORT 1 DRIVERSPORT 2 DRIVERSPORT 3 DRIVERSQUICK FLASHRAMRAM ADDR.REGISTERREGISTERBACCSTACKPIONTERPROGRAMADDRESSREGISTERBUFFERPCINCREMENTERPROGRAMCOUNTERDUAL DPTRINTERRUPT,SERIAL PORTAND TIMER BLOCKSTMP2TMP1ALUPSWTIMING AND CONTROLINSTRUCTIONREGISTERP1.0 - P1.7P3.0 - P3.7P2.0 - P2.7P1.0 - P1

45、.7PORT 3PORTISPPROGRAMLOGICL-S12L-S23L-S34L-S45L-S57L-S68L-S710L-S811L-COM 16L-COM 29L-COM 312STB13GND14R-S127R-S226R-S325R-S424R-S522R-S621R-S719R-S818R-COM 123R-COM 220R-COM 317DATA16CLK15Vss1Vdd28MAIN BOARD:U301TC9164CNGPIN CONFIGURATION?A. LOWEST VOLUME ADJUSTMENT3. Connect a oscilloscope to Lef

46、t channel binding posts.1. Turn down the volume potentiometer to the lowest setting.2. Input a high voltage signal such as 5V from CD input.4. Observing the oscilloscope, adjust VR102, to ma ke the output of speaker the lowest level possible.5. Adjust VR202 as in line #4 above, to make the output of

47、 the speaker the lowest level possible. B. IDLING CURRENT4. Connect the DMM to TP3 & TP4, adjust VR201 and then fine adjust VR203 for 7mV +/- 1mV.3. Connect the DMM to TP1 & TP2, adjust VR101 and then fine adjust VR103 for 7mV +/- 1mV.1. Connect the DMM to TP1 & TP2 as well as TP3 &TP4, adjust the i

48、dle current to 12.5mV via VR201/101.TP1TP2TP3TP4VR101VR201VR202VR203MAIN BOARDC315BEEVR1032. Place the top cover back on the unit and let unit run idle for 10 minutes (no input signal nor load).5. Install the top cover.VR1025. Connect a oscilloscope to Right channel binding posts.RCA31ALRCA31CLRCA32

49、ALRCA32CLRCA33ALRCA33CLRCA33ELR101470R103470R105470C101100pC102100pC103100pR107470 R109470R111470C104100pC105100pC106100pR113470C107100pRCA31BRRCA31DRRCA32BRRCA32DRRCA33BRRCA33DRRCA33FRR201470R203470R205470C201100pC202100pC203100pR207470R209470R211470C204100pC205100pC206100pR213470C207100pR2121MR214

50、 220KR114220KR1121MR1021MR1041MR1061MR1081M R1101MR2021MR2041M R2061M R2081M R2101MQ1012SC2240Q1032SD667AQ1022SA970Q1042SB647AR1221KR1252K2R12833R12910D1031N4148D1041N4148R1264.7KR1274.7KR123750 MF 1%R124470 MF 1%C11347uF/ 25VC11247pF/ 250VC110100pF/ 250V/ NP0R120220D1021N4148R121330KD1011N4148R1193